I have Windows 7 and Ubuntu 12.04 LTS on two separate partitions on my desktop. I used to be able to get the GRUB menu at startup when I had an older Ubuntu version (probably 10.x) but, after upgrading to 12.04 LTS, the menu just flashes for a fraction of a second, giving me no chance to make a selection. I have run boot-repair, tried holding down the SHIFT key, and a number of other solutions described on this forum. Nothing seems to work.
Here is the log from my boot-repair session: http://paste.ubuntu.com/5968366. I really hope that some Ubuntu expert can figure out what's wrong. Really appreciate the help/
Thanks... - Ajoy